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path: root/drivers/i2c/busses/i2c-piix4.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-piix4.c')
-rw-r--r--drivers/i2c/busses/i2c-piix4.c77
1 files changed, 75 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 761f9dd5362..0249a7d762b 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -20,7 +20,7 @@
/*
Supports:
Intel PIIX4, 440MX
- Serverworks OSB4, CSB5, CSB6, HT-1000
+ Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100
ATI IXP200, IXP300, IXP400, SB600, SB700, SB800
SMSC Victory66
@@ -226,6 +226,70 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
return 0;
}
+static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev,
+ const struct pci_device_id *id)
+{
+ unsigned short smba_idx = 0xcd6;
+ u8 smba_en_lo, smba_en_hi, i2ccfg, i2ccfg_offset = 0x10, smb_en = 0x2c;
+
+ /* SB800 SMBus does not support forcing address */
+ if (force || force_addr) {
+ dev_err(&PIIX4_dev->dev, "SB800 SMBus does not support "
+ "forcing address!\n");
+ return -EINVAL;
+ }
+
+ /* Determine the address of the SMBus areas */
+ if (!request_region(smba_idx, 2, "smba_idx")) {
+ dev_err(&PIIX4_dev->dev, "SMBus base address index region "
+ "0x%x already in use!\n", smba_idx);
+ return -EBUSY;
+ }
+ outb_p(smb_en, smba_idx);
+ smba_en_lo = inb_p(smba_idx + 1);
+ outb_p(smb_en + 1, smba_idx);
+ smba_en_hi = inb_p(smba_idx + 1);
+ release_region(smba_idx, 2);
+
+ if ((smba_en_lo & 1) == 0) {
+ dev_err(&PIIX4_dev->dev,
+ "Host SMBus controller not enabled!\n");
+ return -ENODEV;
+ }
+
+ piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
+ if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
+ return -EBUSY;
+
+ if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
+ dev_err(&PIIX4_dev->dev, "SMBus region 0x%x already in use!\n",
+ piix4_smba);
+ return -EBUSY;
+ }
+
+ /* Request the SMBus I2C bus config region */
+ if (!request_region(piix4_smba + i2ccfg_offset, 1, "i2ccfg")) {
+ dev_err(&PIIX4_dev->dev, "SMBus I2C bus config region "
+ "0x%x already in use!\n", piix4_smba + i2ccfg_offset);
+ release_region(piix4_smba, SMBIOSIZE);
+ piix4_smba = 0;
+ return -EBUSY;
+ }
+ i2ccfg = inb_p(piix4_smba + i2ccfg_offset);
+ release_region(piix4_smba + i2ccfg_offset, 1);
+
+ if (i2ccfg & 1)
+ dev_dbg(&PIIX4_dev->dev, "Using IRQ for SMBus.\n");
+ else
+ dev_dbg(&PIIX4_dev->dev, "Using SMI# for SMBus.\n");
+
+ dev_info(&PIIX4_dev->dev,
+ "SMBus Host Controller at 0x%x, revision %d\n",
+ piix4_smba, i2ccfg >> 4);
+
+ return 0;
+}
+
static int piix4_transaction(void)
{
int temp;
@@ -423,6 +487,8 @@ static struct pci_device_id piix4_ids[] = {
PCI_DEVICE_ID_SERVERWORKS_CSB6) },
{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
PCI_DEVICE_ID_SERVERWORKS_HT1000SB) },
+ { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
+ PCI_DEVICE_ID_SERVERWORKS_HT1100LD) },
{ 0, }
};
@@ -433,7 +499,14 @@ static int __devinit piix4_probe(struct pci_dev *dev,
{
int retval;
- retval = piix4_setup(dev, id);
+ if ((dev->vendor == PCI_VENDOR_ID_ATI) &&
+ (dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS) &&
+ (dev->revision >= 0x40))
+ /* base address location etc changed in SB800 */
+ retval = piix4_setup_sb800(dev, id);
+ else
+ retval = piix4_setup(dev, id);
+
if (retval)
return retval;